Sometime ago, a patent filed by Apple sparked speculations that we could be seeing an iPhone with integrated solar cells in the future. We don't know if and when it will ever happen, so for now we have to be content with third party products--like iPhone compatible solar chargers. One new product is a PV-integrated case by Mobilefun, which could power your phone during those energy-sucking 3G-surfing sessions when you're outside your home or office.

The solar-powered case can already juice your phone in just three hours of sun exposure through the use of its 1500 mAh battery. If you want a full charge though, 10 hours of exposure is needed. To use, simply slide the iPhone and charge. The case also has a mini-USB connection for emergency charging in case sunlight is scarce in your part of the world during a particular season. The solar-powered iPhone 3G case will be available in black or white starting mid-August.